Question

Riya went with her mother to a jeweller's shop to purchase jewellery. Her mother asked the jeweller to show them
jewellery in pure gold and it should not be mixed with any other things.
Was Riya's mother right for asking jewellery in pure gold? give reason​

Answer 1

To polish a gold ornament, it is dipped in a liquid called aquaregia (a mixture of hydrochloric acid and nitric acid). On getting the environment of aquaregia, the outer layer of gold dissolves and the inner shiny layer appears. The dissolving of the layer causes a reduction in the weight of the jewellery..

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Answer 2

no

Explanation:

pure gold can't be hard as alloy gold should mix with silver and copper in jewelry